Paving material and process of making same



a. COMPOSITIONS,

COATING R PLASTIC.

PATENT OFFICE.

MATTHEW B. KENDRICK, OF LOUISVILLE, KENTUCKY.

PAVING MATERIAL AND PROCESS OF MAKING SAME.

80 Drawing.

To all whom it may concern:

Be it known that I, MATTHEW B. KEN- DRICK, a citizen of the United States, residing at Louisville, in the county of Jefferson and State of Kentuck have invented a new and useful Paving aterial and Process of Making Same, of which the following is a specification.

The invention relates generally to outdoor pavements that are exposed to the weather, and an object of my invention is to provide a pavement for highways or streets, or for sidewalks, which shall be so constructed or composed of such material as to be firm and durable and adapted to prevent the accumulation of ice and in some cases prevent the formation of ice on the pavement, or to prevent adhesion ofice to the avement which is a source of danger and trou lesome to remove, during winter seasons; and the invention relates more particularly to the uppermost or top portion of the pavement, and also to the material adapted to constitute such portion, and to the process of making the same, in conformity with the objects of the invention. Another object is to provide an improved material for paving which shall be so constituted as to be adapted to prevent or tend to prevent dangerously icy road or sidewalk surfaces, in order to eliminate danger to pedestrians, animals or vehicles using the pavements. A further object is to provide an improved paving material which shall be adapted to be 35 incorporated or used with other material Specification of Letters Patent.

' Application filed April 26,

Patented Mar. 8, 1921.

1919. Serial No. 292,946.

sand or sand and specially prepared gall n t1e rcpgrti n of approrimately ninety ar so san ap te n aprjgs o salt b we1 ht. In the moi preii armg mmgosition, a quantity of oar e salt is placed in a closed mixer or agita or, preferably a revolving type, and subjected therein (while being agitated) to a temperature of about 180 degrees, Fahn, being heated and thoroughly dried, and in the operation the salt is broken up and pulverized so as to be finely granulated. The sand and it and the prepared salt are placed together and sli ht Iv dampened so that the particles of 7 salt shall ad ere to the sand grains in case the sand is not already damp or slightly wet when the sand is dry about ten gallons of water or less to one thousand pounds of sand is preferably used. The dampened sand and salt mass is placed in a mechanical mixer, preferably a closed revolving type, and gradually subjected to a super-heating temperature of a proximatelyQ OQ de rees, Fahn, the ing'fe rents ofthe mass eiiig thoroughly mixed together. In the process of preparing the material the salt is taken up or absorbed by the sand. The resultant composition which is dry and hard and sandlike in consistency, for convenience is run through a 40 by 80 mesh sieve and put up in acka es preferably in sacks of 100 pounds ach.

In the preparation of my surfacing material for the top or surface layer of a street or roadway pavement, 800 pounds of or materials in the construction of pavethe rlmar com osition. 100 pounds of ments, and be qualified to prevent the formaasp Half. and IUU pounds of lime-stone dust tion or accumulation of ice in cold weather o upon the pavement. And a still further object is to provide a simple and improved process of producing or preparing top or surface coatings of pavements and ingredients thereof.

With the above-mentioned and other objects in view, the invention consists in a novel primar omposition of sand and salt 1'' c on sodi m o e use as a component o surfacing material of pavements, and

ortland or similar cemen are IlllX toge er 0 pro uce pounds of the surfacing material, or in similar proportions. This materlal'may be used also if desired in the construction of sidewalks or other pavements.

In the preparation of a modified surfacing material, for hard-surface pavements such as sidewalks, the asphalt is preferably omitted, and the primarv'composition and cement are mixed together in the proportion of about fifty per cent. each, or of equal parts.

In practical use, the improved surfacing material is placed u on a suitable foundation which may di er as ma be desired to suit different conditions. hen conditions are favorable to the formation of ice 110 on pavements, the improved surfacing material, by virtue of the well-known proper- Lkdliiiiu ties of salt incorporated therein, prevents the accumulation of ice or the solidification of moisture upon the pavement, the salineness of the sand in the composition or material having a tendency directly to dissolve or melt ice on the pavement.

I claim:

1. A paving material composition comprising approximately ninety parts of sand and ten parts of salt by weight intimately combined and the sand having salt absorbed therein, the composition being granulated and dry.

2. A paving material composition consisting of a mixture containing approximately ten parts by weight of thoroughly dry salt pulverized and approximately ninety parts of sand by weight mixed together and being dry and hard and of fixed consistency.

3. A paving material comprising a composition consisting of approximately equal parts of cement and a primary composition mixed together, the primary composition consisting of approximately ninety parts of sand and ten parts of salt by weight intimately combined and the sand havmg salt absorbed therein.

4. The process of making a component of paving material, having sand and salt there-- in, consisting in subjecting the salt to a high degree of heat, which shall be approximately 180 deg, Fah., and in subsequently mixing the treated salt with the sand.

5. The process of makin a component of paving material, having sa inous sand therein, consisting in subjecting salt to a high degree of heat, placing the treated salt with a quantity of sand to form a mass, and in mixing the constituents of the mass together in damp condition and subjecting the mass during mixing operations to a relatively higher degree of heat.

In testimony whereof, I afiix my signture in presence 0 two witnesses.

MATTHEW B. KENDRICK.

Witnesses DANL. L. BEDINGER, VIVIAN MAYFIELD. 

